Replace incomplete clearSkillCaches() with clearCommandsCache() so the
loadAllCommands memoize layer is also busted when a cloud favorite skill is
enabled or disabled via /hub.
Add skillChangeDetector.notify() to trigger an immediate REPL command list
refresh instead of waiting for the file watcher to detect the change.
Signed-off-by: 林凯90331 <90331@sangfor.com>
Co-authored-by: CoStrict <zgsm@sangfor.com.cn>
